CN102692139A - Water film evaporative condenser vacuum tube box - Google Patents
Water film evaporative condenser vacuum tube box Download PDFInfo
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- CN102692139A CN102692139A CN201210172838XA CN201210172838A CN102692139A CN 102692139 A CN102692139 A CN 102692139A CN 201210172838X A CN201210172838X A CN 201210172838XA CN 201210172838 A CN201210172838 A CN 201210172838A CN 102692139 A CN102692139 A CN 102692139A
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- bobbin carriage
- gripper shoe
- water film
- horizontal supporting
- supporting plate
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Abstract
The invention relates to a steam power cycle system of a steam turbine generator unit in a thermal power plant, in particular to a water film evaporative condenser vacuum tube box. Horizontal and vertical support plates inside the tube box divide the large-span structure in the width and the height directions of the tube box into a plurality of small-span structures, so that the external pressure bearing capacity of the rectangular plate tube box during the condenser operation is greatly enhanced. Balance flow-passing holes are formed in both the horizontal support plate and the vertical support plate. When the total circulation areas of heat exchange tubes above and below the vertical support plate are different, the total area of the balance flow-passing holes in the horizontal support plate is larger than the larger one in the total circulation areas of the heat exchange tubes above and below the horizontal support plate. The water film evaporative condenser vacuum tube box has the benefits that the support plates are additionally mounted inside the tube box to reduce the plate span of the tube box and enhance the external pressure resistance of the tube box.
Description
Technical field
The present invention relates to the Steam Power Circulation system of thermal power plant Turbo-generator Set, be specifically related to a kind of water film evaporation condenser vacuum bobbin carriage.
Background technology
The Steam Power Circulation in thermal power plant need be condensed into water with the exhaust steam of steam turbine outlet.The thermal power plant of North China and the Northwest is restricted by water resource at present, the Direct Air-Cooled that has been widely used condensing mode.The summer high temperature period is power load spike period just also, and it is parallelly connected with Direct Air-Cooled that the water film evaporation condenser can be used as the spike condensing system, and unit is completely sent out when guaranteeing summer high temperature.If with the cooling water source of middle water as the water film evaporation condenser, then move the water film evaporation condenser in the time at non-summer high temperature, also can reduce turbine back pressure, multiple; Perhaps keep turbine back pressure, but reduce Direct Air-Cooled heat exchange area and the blower fan quantity that puts into operation, reduce operating cost.If water resource of reclaimed water is sufficient, then exhaust steam in steam turbine also can all come condensation with the moisture film evaporative condenser.So both the investment-saving was saved operating cost again.
According to the Steam Power Circulation principle, it is big more that steam turbine is imported and exported the steam temperature difference, and then steam turbine acquisition heat energy is many more, and generating is just many more.When being 0 ℃ to 40 ℃ scope as the ambient air temperature of final low-temperature receiver, the steam turbine of Direct Air-Cooled outlet exhaust steam temperature is about 38 ℃ to 82 ℃, corresponding exhaust steam saturation pressure be 7kPa to 51kPa, be in vacuum range.Concerning direct air cooled condenser and water film evaporation condenser, walk exhaust steam in the pipe, walk air outside the pipe, the pressure reduction that heat exchanger tube bears is equivalent to external pressure.So the heat exchanger tube of condenser is wanted to bear external pressure, can not be crushed or crush.
The cool water shower device is made up of several nozzles on several showers that are that horizontal plane distributes and the shower in the water film evaporation condenser, is a horizontal plane so spray out the water surface.The heat-exchanging tube bundle width is by the decision of spray width, and the heat-exchanging tube bundle height is by row's number decision of heat exchanger tube, so the section of heat-exchanging tube bundle (tube bank height * tube bank is wide) is exactly a rectangle, like this, cooling water distributes more even on each row's heat exchanger tube, fully heat exchange.Because the heat-exchanging tube bundle section is a rectangle, so the tube sheet of fixing tube bank also is a rectangle.
The water film evaporation condenser generally is placed in the open, and heat-exchanging tube bundle will stand the high temperature low temperature of season alternation, and the alternate stress that stands to put into operation and stop transport after having grown service time, in the hundreds of root pipe of heat-exchanging tube bundle, has several tubes to leak unavoidably.In order to guarantee that vacuum does not descend, need the pipe that leaks is in time blocked up, so bobbin carriage adopts the threaded plug type cover plate.During leak stopping, turn on plug corresponding on the cover plate, squeeze into stopper, tighten plug again, get final product leak stopping to the pore of blow-by tube.Number of aperture on the cover plate is identical with number of aperture on the tube sheet.For ease of perforate on the cover plate with make things convenient for leak stopping, cover plate is also got the rectangular flat shape.Because tube sheet and cover plate are rectangle, so bobbin carriage rectangular box shape container just, promptly bobbin carriage is combined by 6 flat boards (top board, base plate, two side plates, tube sheet and cover plates).
Learnt that by material mechanics principle when other condition was identical, it is strong that cylindrical vessel bears the external pressure ability, box-like dull and stereotyped container bears a little less than the external pressure ability.For box-like dull and stereotyped container, when other condition was constant, dull and stereotyped span was big more, and then stress is big more, bearing capacity more a little less than.The heat exchanger tube of water film evaporation condenser adopts pipe usually, and it is stronger to bear the external pressure ability, does not have problem.But bobbin carriage is box-like dull and stereotyped container, and the stress when bearing external pressure can be very big, need bear the structural design of external pressure specially.Otherwise bobbin carriage can be out of shape, and can cause bond open, and vacuum descends, and turbine back pressure raises, and generating capacity descends.Before this, the water film evaporation condenser was not adopted in the thermal power plant basically, so do not expose this problem yet.The object of the invention carries out reasonable structural design exactly, to strengthen the ability that water film evaporation condenser bobbin carriage bears external pressure.
Summary of the invention
The technical problem not enough to be solved that the present invention is directed to above-mentioned prior art is: a kind of water film evaporation condenser vacuum bobbin carriage that is used for the thermal power plant is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of water film evaporation condenser vacuum bobbin carriage; Comprise and taking over and the rectangular box shape casing; The rectangular box shape casing comprises top board, base plate, two side plates, tube sheet and cover plates; Described box house is provided with horizontal supporting plate and vertical gripper shoe, and horizontal supporting plate and vertical gripper shoe are separated into some little span structures with the big span structure of casing width and short transverse.
Because bobbin carriage outside is a surrounding air, the inside is the steam that the certain vacuum degree is arranged, so the external pressure that the vacuum bobbin carriage bears atmospheric pressure at most just.During design, be an atmospheric pressure value by external pressure.
The admission bobbin carriage of condenser and draining bobbin carriage all will have the adapter that is communicated with the outside, take over generally to be contained on the side plate of bobbin carriage, so side plate
xBe greater than the diameter of adapter to length.The top board of bobbin carriage and base plate
xTo length and two side plates
xTo equal in length.
Boiler feedwater or condensate just are used for Steam Power Circulation after through precision processing, are the requirement of coupling water quality precision processing, and the bobbin carriage material of water film evaporation condenser is generally got stainless steel.
According to thermic load size and steam flow size, can confirm heat exchange caliber, heat exchanger tube wall thickness, heat exchanger tube row number, row spacing, every row's heat exchanger tube radical and tube pitch through design of heat transfer.Tube sheet width and height have so also just been confirmed.
The bobbin carriage width is generally 3 meters, and when the flat board of so big span bears external pressure, cave in easily in the middle part.Arrange number more for a long time when pipe, the bobbin carriage height also can be bigger, and span is also bigger, also can cave in the middle part of two side plates.The dull and stereotyped depression of bobbin carriage can cause the weld seam on the corner to break or the whole destruction of bobbin carriage.If top board, base plate and side plate thickening are a lot, though can avoid depression, metal material consumption is too much, and is uneconomical.
The present invention is installed gripper shoe additional in bobbin carriage inside, to reduce the dull and stereotyped span of bobbin carriage, strengthens the ability of bobbin carriage opposing external pressure.
Along the bobbin carriage short transverse, install 1 horizontal supporting plate additional, 1 big span of short transverse is divided into 2 little spans.As shown in Figure 2, along the bobbin carriage width, two vertical gripper shoes are divided into 3 little spans with 1 big span of horizontal direction.Bobbin carriage in the horizontal direction with vertical direction on span reduced, then bobbin carriage top board, base plate and side plate opposing external pressure ability has just strengthened.
Horizontal supporting plate exists with vertical gripper shoe
xThe end face of direction will be welded on the tube sheet, withstands on the cover plate, the horizontal span of tube sheet and cover plate and vertical span has also been reduced, so the anti-pressure ability of tube sheet and cover plate has also strengthened.
Admission bobbin carriage and draining bobbin carriage all have adapter, but the bobbin carriage that turns between two tube sides is not just taken over.All will open the balance flowing hole on horizontal supporting plate and the vertical gripper shoe, an effect is the pressure of balance plate both sides, avoids gripper shoe to receive cross force and bending.Second effect is to let steam or the condensate can free flow, and such as turning in the bobbin carriage, steam and condensate are come out from the heat exchanger tube of last tube side, turn to flow to down the heat exchanger tube of tube side.For guaranteeing to turn to and circulate freedom, the perforate of horizontal supporting plate is bigger, and flow resistance is very little.After considering that steam condenses, volume can reduce, the heat exchanger tube row number of following tube side can lack than last tube side, the heat exchanger tube circulation gross area that descend tube side like this is just less than the last tube side heat exchanger tube gross area that circulates.If consider that the water film evaporation condenser can be born bigger factors such as condensing amount sometimes, also tube side heat exchanger tube row number is identical up and down.Perforate principle on the horizontal supporting plate is, total open area is greater than bigger that of area in two tube side heat exchanger tubes circulation gross areas on the gripper shoe.
The invention has the beneficial effects as follows: install gripper shoe additional in bobbin carriage inside,, strengthen the ability of bobbin carriage opposing external pressure to reduce the dull and stereotyped span of bobbin carriage.
Description of drawings:
Fig. 1 is a water film evaporation condenser vacuum bobbin carriage sketch map.
Fig. 2 is a water film evaporation condenser vacuum bobbin carriage inner support panels decomposing schematic representation.
Description of reference numerals:
1, top board 2, base plate 3, side plate
4, cover plate 5, plug 6, horizontal supporting plate
7, vertically gripper shoe 8, tube sheet 9, adapter
The specific embodiment
The present invention implements like this:
In Fig. 1, along the bobbin carriage short transverse, install 1 horizontal supporting plate additional, 1 big span of short transverse is divided into 2 little spans.As shown in Figure 2, along the bobbin carriage width, two vertical gripper shoes are divided into 3 little spans with 1 big span of horizontal direction.Bobbin carriage in the horizontal direction with vertical direction on span reduced, then bobbin carriage top board, base plate and side plate opposing external pressure ability has just strengthened.
As shown in Figure 1, horizontal supporting plate exists with vertical gripper shoe
xThe end face of direction will be welded on the tube sheet, withstands on the cover plate, the horizontal span of tube sheet and cover plate and vertical span has also been reduced, so the anti-pressure ability of tube sheet and cover plate has also strengthened.
Water film evaporation condenser vacuum bobbin carriage generally is welded with corrosion resistant plate.The thickness of the top board 1 of bobbin carriage, base plate 2 and side plate 3 is got 10mm to 16mm.It is many to hole on tube sheet 8 and the cover plate 4, and strength reduction is big, and thickness of slab should be got bigger, and thickness range is that 12 mm are to 20mm.Gripper shoe in the bobbin carriage has the balance flowing hole, does not bear pressure, and desirable 10 mm of thickness of slab are to 12mm.
Along short transverse, every separated 300mm is provided with a horizontal supporting plate 6 to 500mm.According to the size of actual bobbin carriage height, one or two horizontal supporting plates can be set.With the overlapping place of horizontal support plate thickness projection, pipe is not arranged, in order to avoid horizontal supporting plate is blocked pore in the open pipe hole yet on the tube sheet.Horizontal supporting plate is welded on two side plates and fixes.
Broad ways, every separated 600mm is provided with a vertical gripper shoe 7 to 900mm.On vertical gripper shoe and position that horizontal supporting plate combines, vertically gripper shoe is respectively opened groove half with horizontal supporting plate, mutually after the insertion, and vertical gripper shoe and the engaged orthohormbic structure of horizontal supporting plate formation.With the vertical overlapping place of gripper shoe thickness projection, pipe is not arranged in the open pipe hole yet on the tube sheet, in order to avoid vertically gripper shoe is blocked pore.Vertically gripper shoe is welded on the inner surface of top board and base plate and fixes.Can see the another kind of scheme of vertical gripper shoe among Fig. 2, promptly vertically gripper shoe is not slotted yet, and not with the interlock of horizontal supporting plate quadrature, but vertical gripper shoe is divided into two parts up and down.The welded top of last half vertical gripper shoe is on the inner surface of top board, and the bottom is welded on the upper surface of horizontal supporting plate.The bottom of half vertical gripper shoe is welded on the inner surface of base plate down, and welded top is at the lower surface of horizontal supporting plate.
Since the effect of gripper shoe, bobbin carriage in the horizontal direction with vertical direction on span reduced, then bobbin carriage top board, base plate and side plate opposing external pressure ability have just strengthened.
Before the welding of bobbin carriage and tube sheet, can be earlier top board, base plate, side plate and the inner support panels of bobbin carriage be welded earlier.After the welding of tube sheet and pipe is accomplished, again with the top board of bobbin carriage, base plate, two side plates, horizontal supporting plate with vertically gripper shoe and tube sheet weld.
Just in case a certain or a few heat exchanger tubes leakages do not descend in order to guarantee vacuum, need the pipe that leaks is in time blocked up, so bobbin carriage employing threaded plug type cover plate.During leak stopping, turn on plug 5 corresponding on the cover plate, squeeze into stopper, tighten plug again, get final product leak stopping to the pore of blow-by tube.Accurately aim at pore for the assurance pipe plug opening, cover plate and tube sheet can mill out the rectangle step that embeds bobbin carriage simultaneously, about the high 5mm of step, so that bobbin carriage welds location when assembling.Cover plate and tube sheet can drillings, to guarantee the concentric of tubesheet holes and cover board hole.
After bobbin carriage was soldered on the tube sheet 8, the adapter 9 that will have flange was welded on the side plate 3 of bobbin carriage.
At last, cover plate 4 is soldered on the bobbin carriage.Cover plate 4 can weld with top board 1, base plate 2 and the side plate 3 of bobbin carriage, but cover plate can't weld with the gripper shoe in the bobbin carriage.Because gripper shoe has been soldered on bobbin carriage and the tube sheet and has fixed; Do not have no relations so do not weld between cover plate and the gripper shoe yet; As long as the gap of cover plate and gripper shoe is very little, gripper shoe just can play the effect of supporting cover plate, and cover plate just can not be out of shape under external pressure yet.
After cover plate 4 is soldered on the bobbin carriage, again plug 5 is screwed on the pipe plug opening of cover plate, compresses gasket seal.
The above; It only is the preferred embodiment of a kind of water film evaporation condenser vacuum of the present invention bobbin carriage; Be not that technical scope of the present invention is done any restriction; Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention above any trickle modification, equivalent variations and modification that embodiment did.
Claims (6)
1. water film evaporation condenser vacuum bobbin carriage; Comprise and taking over and the rectangular box shape casing; The rectangular box shape casing comprises top board (1), base plate (2), two side plates (3), tube sheet (8) and cover plate (4); It is characterized in that: described box house is provided with horizontal supporting plate (6) and vertical gripper shoe (7), and horizontal supporting plate (6) and vertical gripper shoe (7) are separated into some little span structures with the big span structure of casing width and short transverse.
2. water film evaporation condenser vacuum bobbin carriage as claimed in claim 1 is characterized in that, all has the balance flowing hole on described horizontal supporting plate (6) and the vertical gripper shoe (7).
3. water film evaporation condenser vacuum bobbin carriage as claimed in claim 1 is characterized in that described horizontal supporting plate (6) is welded on the inner surface of two side plates (3).
4. water film evaporation condenser vacuum bobbin carriage as claimed in claim 1; It is characterized in that; Described horizontal supporting plate (6) and vertical gripper shoe (7) are on the position that mutually combines; Horizontal supporting plate (6) and vertical gripper shoe (7) have respectively been opened and have been used for half groove of insertion mutually, and horizontal supporting plate (6) has constituted engaged orthohormbic structure with vertical gripper shoe (7).
5. water film evaporation condenser vacuum bobbin carriage as claimed in claim 1 is characterized in that, described vertical gripper shoe (7) is welded on the inner surface of top board (1) and base plate (2).
6. water film evaporation condenser vacuum bobbin carriage as claimed in claim 1 is characterized in that, described vertical gripper shoe (7) also can be divided into two parts up and down; Top part is welded on bobbin carriage top board (1) and the horizontal supporting plate (6); Following part is welded on horizontal supporting plate (6) and the bobbin carriage base plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172838XA CN102692139A (en) | 2012-05-30 | 2012-05-30 | Water film evaporative condenser vacuum tube box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172838XA CN102692139A (en) | 2012-05-30 | 2012-05-30 | Water film evaporative condenser vacuum tube box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102692139A true CN102692139A (en) | 2012-09-26 |
Family
ID=46857757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210172838XA Pending CN102692139A (en) | 2012-05-30 | 2012-05-30 | Water film evaporative condenser vacuum tube box |
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| Country | Link |
|---|---|
| CN (1) | CN102692139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780881A (en) * | 2019-03-12 | 2019-05-21 | 中国电建集团贵州电力设计研究院有限公司 | One kind recycling Effuser device for condenser condensed water |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH640598A5 (en) * | 1979-09-06 | 1984-01-13 | Sulzer Ag | Steam power plant with air-cooled steam condenser |
| JPS6080080A (en) * | 1983-10-11 | 1985-05-07 | Mitsubishi Heavy Ind Ltd | Steam condenser |
| US5522454A (en) * | 1992-10-21 | 1996-06-04 | Gec Alsthom Electromecanique Sa | Condenser made of concrete for an axial exhaust steam turbine, with simplified mounting of heat exchange bundles |
| CN2335116Y (en) * | 1998-08-27 | 1999-08-25 | 张延丰 | Rectangular pipe box with new structure for air cooling device |
| WO2003078904A1 (en) * | 2002-03-19 | 2003-09-25 | Takahiro Agata | Heat exchange structure body for atmospheric pressure steam and heat exchange method |
| CN101493300A (en) * | 2009-02-09 | 2009-07-29 | 广州市高澜水技术有限公司 | Air cooler for cooling DC converter valve and fabrication technology thereof |
| CN101545728A (en) * | 2009-05-06 | 2009-09-30 | 吴植仁 | Non-vibrating water-cooled condenser |
| CN202582242U (en) * | 2012-05-30 | 2012-12-05 | 深圳中兴新源环保股份有限公司 | Vacuum pipe box for water film evaporating condenser |
-
2012
- 2012-05-30 CN CN201210172838XA patent/CN102692139A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH640598A5 (en) * | 1979-09-06 | 1984-01-13 | Sulzer Ag | Steam power plant with air-cooled steam condenser |
| JPS6080080A (en) * | 1983-10-11 | 1985-05-07 | Mitsubishi Heavy Ind Ltd | Steam condenser |
| US5522454A (en) * | 1992-10-21 | 1996-06-04 | Gec Alsthom Electromecanique Sa | Condenser made of concrete for an axial exhaust steam turbine, with simplified mounting of heat exchange bundles |
| CN2335116Y (en) * | 1998-08-27 | 1999-08-25 | 张延丰 | Rectangular pipe box with new structure for air cooling device |
| WO2003078904A1 (en) * | 2002-03-19 | 2003-09-25 | Takahiro Agata | Heat exchange structure body for atmospheric pressure steam and heat exchange method |
| CN101493300A (en) * | 2009-02-09 | 2009-07-29 | 广州市高澜水技术有限公司 | Air cooler for cooling DC converter valve and fabrication technology thereof |
| CN101545728A (en) * | 2009-05-06 | 2009-09-30 | 吴植仁 | Non-vibrating water-cooled condenser |
| CN202582242U (en) * | 2012-05-30 | 2012-12-05 | 深圳中兴新源环保股份有限公司 | Vacuum pipe box for water film evaporating condenser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780881A (en) * | 2019-03-12 | 2019-05-21 | 中国电建集团贵州电力设计研究院有限公司 | One kind recycling Effuser device for condenser condensed water |
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Application publication date: 20120926 |